变形速率对GH3625合金弹-塑性变形行为的影响

高钰璧, 丁雨田, 李海峰, 董洪标, 张瑞尧, 李军, 罗全顺

Effect of Deformation Rate on the Elastic-Plastic Deformation Behavior of GH3625 Alloy

GAO Yubi, DING Yutian, LI Haifeng, DONG Hongbiao, ZHANG Ruiyao, LI Jun, LUO Quanshun

图1 GH3625合金在不同变形速率(r)下的压缩应力-应变曲线和加工硬化率曲线

Fig.1 Compression stress-strain curves (a, b) and work hardening rate curves (c, d) of GH3625 alloy at different deformation rates (r) (Inset in Fig.1c show the locally enlarged work hardening rate curve of alloy elastic deformation stage at different deformation rates; A, B, and C represent the widths of the alloy elasto-plastic transition stage at different deformation rates in Figs.1b and d, while a, b, and c are the elasto-plastic transition points at different deformation rates; The sawtooth on the curve in Fig.1a represents the stress relaxation phenomenon under displacement-control mode (holding strain))